P2B1ACylinder 6 Injection Pulse Offset Not Learned
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2B1A reports that the pulse offset for injector 6 has not been learned. Public manufacturer sources do not name this code; on the 3.0 L V6 Power Stroke built by Ford, where cylinder 6 is the last one, Ford's summary lists only the exceeded-limit code P2B1B. CARB explains why such learning exists in diesel engines: since 2010, sections (f)(4.2.2) and (f)(4.2.3) demand checks that the right fuel quantity arrives at the right crank angle, and where no failure could push emissions over the threshold, reaching the control limits serves as the criterion instead. An unlearned offset means that pilot quantities on cylinder 6 rest on nominal data only. Few symptoms beyond the lamp are to be expected; the cure is completing the learn under suitable driving, then checking injector 6 if it never succeeds.
- What you may notice
- Warning lamp
- Perhaps slightly harder combustion noise at idle
- Likely causes
- LikelyLearn for injector 6 still pending after a reset or parts replacement
- PossibleMostly short trips with a cold engine, so the learn rarely starts
- RareInjector 6 delivering so erratically that no value can be fixed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.